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Daily observations of the binary X-ray pulsar GX 1+4 were made with the Rossi X-ray Timing Explorer (RXTE) satellite between 1997 May 16-20 as part of a four-month monitoring program. On May 17 the sharp dips normally observed in the lightcurve were all but absent, resulting in a pulse fraction f_p approx. 0.5 instead of the more typical value of approx. 0.8 measured before and after. Also observed was a dramatic hardening of the 2-40 keV phase-averaged spectrum. The power-law photon index wasdoi:10.1086/317279 fatcat:c46s6yduc5gati32avolltwfe4